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ALSA: hda: cs35l56: Fix lifecycle of codec pointer

Message ID 20240531112716.25323-1-simont@opensource.cirrus.com
State Accepted
Commit d339131bf02d4ed918415574082caf5e8af6e664
Headers show
Series ALSA: hda: cs35l56: Fix lifecycle of codec pointer | expand

Commit Message

Simon Trimmer May 31, 2024, 11:27 a.m. UTC 
The codec should be cleared when the amp driver is unbound and when
resuming it should be tested to prevent loading firmware into the device
and ALSA in a partially configured system state.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
---
 sound/pci/hda/cs35l56_hda.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/sound/pci/hda/cs35l56_hda.c b/sound/pci/hda/cs35l56_hda.c
index 11b0570ff56d..0923e2589f5f 100644
--- a/sound/pci/hda/cs35l56_hda.c
+++ b/sound/pci/hda/cs35l56_hda.c
@@ -735,6 +735,8 @@  static void cs35l56_hda_unbind(struct device *dev, struct device *master, void *
 	if (comps[cs35l56->index].dev == dev)
 		memset(&comps[cs35l56->index], 0, sizeof(*comps));
 
+	cs35l56->codec = NULL;
+
 	dev_dbg(cs35l56->base.dev, "Unbound\n");
 }
 
@@ -840,6 +842,9 @@  static int cs35l56_hda_system_resume(struct device *dev)
 
 	cs35l56->suspended = false;
 
+	if (!cs35l56->codec)
+		return 0;
+
 	ret = cs35l56_is_fw_reload_needed(&cs35l56->base);
 	dev_dbg(cs35l56->base.dev, "fw_reload_needed: %d\n", ret);
 	if (ret > 0) {